A quarter of this cake has been cut away showing three identical layers inside. This puzzle looks simple, but it is very ingenious. Can you have your cake and eat it too? Hanayama cast metal brain teasers have 6 levels of difficulty, and each puzzle is Mensa-rated. Level 4 puzzles are considered challenging by most puzzlers. By American designer Bram Cohen. Details: Includes 1 puzzle For 1 player Level 4 For ages 12 and up